5 Configuration
Installation manual
16
08S23DAV
Daikin Altherma – Low temperature split
4P499571-1D – 2018.11
5.2.4
Configuration wizard: Backup heater
The backup heater is adapted to be connected to most common
European electricity grids. If the backup heater is available, the
voltage, configuration and capacity must be set on the user
interface.
The capacities for the different steps of the backup heater must be
set for the energy metering and/or power consumption control
feature to work properly. When measuring the resistance value of
each heater, you can set the exact heater capacity and this will lead
to more accurate energy data.
Voltage
The optional external BUH can be set to 230V, 1ph, 230V, 3ph or
400V, 3ph.
#
Code
Description
[9.3.2]
[5‑0D]
▪ 0: 230V, 1ph
▪ 1: 230V, 3ph
▪ 2: 400V, 3ph
Configuration
The backup heater can be configured in different ways. It can be
chosen to have a 1-step only backup heater or a backup heater with
2 steps. If 2 steps, the capacity of the second step depends on this
setting. It can also be chosen to have a higher capacity of the
second step in emergency.
#
Code
Description
[9.3.3]
[4‑0A]
▪ 0: Relay 1
▪ 1: Relay 1 / Relay 1+2
(a)
▪ 2: Relay 1 / Relay 2
(a)
▪ 3: Relay 1 / Relay 2 Emergency Relay
1+2
(a)
(a)
Not available for 3V models.
INFORMATION
Settings [9.3.3] and [9.3.5] are linked. Changing one
setting influences the other. If you change one, check if the
other is still as expected.
INFORMATION
During normal operation, the capacity of the second step of
the backup heater at nominal voltage is equal to
[6‑03]+[6‑04].
INFORMATION
If [4‑0A]=3 and emergency mode is active, the power
usage of the backup heater is maximal and equal to
2×[6‑03]+[6‑04].
INFORMATION
Only for systems with integrated domestic hot water tank: If
the storage temperature set point is higher than 50°C,
Daikin recommends NOT to disable the backup heater
second step because it will have a big impact on the
required time for the unit to heat up the domestic hot water
tank.
Capacity step 1
#
Code
Description
[9.3.4]
[6‑03]
▪ The capacity of the first step of the
backup heater at nominal voltage.
Additional capacity step 2
#
Code
Description
[9.3.5]
[6‑04]
▪ The capacity difference between the
second and first step of the backup
heater at nominal voltage. Nominal
value depends on backup heater
configuration.
5.2.5
Configuration wizard: Main zone
The most important settings for the main leaving water zone can be
set here.
Emitter type
Depending on the system water volume and the heater emitter type
of the main zone, the heat up of the main zone can take longer. This
setting can compensate for a slow or a quick heating system during
the heat up cycle. The target delta T for the main zone will depend
on this setting.
In room thermostat control, this setting will influence the maximum
modulation of the desired leaving water temperature.
Therefore it is important to set this correctly and in accordance with
your system layout.
#
Code
Description
[2.7]
[2‑0C]
▪ 0: Underfloor heating
▪ 1: Fancoil unit
▪ 2: Radiator
The setting of the emitter type has an influence on the space heating
setpoint range and the target delta T in heating as follows:
Description
Space heating
setpoint range
Target delta T in
heating
0: Underfloor heating Maximum 55°C
Variable
1: Fancoil unit
Maximum 55°C
Variable
2: Radiator
Maximum 65°C
Fixed 10°C
NOTICE
For radiators, the average emitter temperature will be
lower compared to underfloor heating, due to the fixed
delta T of 10°C. To compensate, you can:
▪ Increase the weather dependent curve desired
temperatures [2.5].
▪ Enable leaving water temperature modulation and
increase the maximum modulation [2.C].
Control
For the control of the unit there are 3 possibilities:
Control
In this control...
Leaving water
Unit operation is decided based on the leaving
water temperature regardless the actual room
temperature and/or heating demand of the
room.
External room
thermostat
Unit operation is decided by the external
thermostat or equivalent (e.g. heat pump
convector).
Room thermostat
Unit operation is decided based on the ambient
temperature of the user interface used as a
room thermostat.
#
Code
Description
[2.9]
[C‑07]
▪ 0: Leaving water
▪ 1: External room thermostat
▪ 2: Room thermostat
